rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2645 jiffies s: 13629 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6454 Comm: syz.0.693 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__kasan_check_read+0x6/0x10 mm/kasan/shadow.c:31
Code: 41 5f 5d c3 48 c7 c7 db af 61 8c eb 0a 48 c7 c7 62 2d 46 8c 48 89 de e8 88 89 51 08 31 ed eb d7 00 00 cc cc 89 f6 48 8b 0c 24 <31> d2 e9 c3 ec ff ff 0f 1f 00 89 f6 48 8b 0c 24 ba 01 00 00 00 e9
RSP: 0018:ffffc900001dfb38 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff8164079e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90b10240
RBP: ffffc900001dfd70 R08: dffffc0000000000 R09: 1ffffffff2162048
R10: dffffc0000000000 R11: fffffbfff2162049 R12: ffff88802fd9e4d8
R13: ffff88802fd9e578 R14: 000000000000002d R15: ffff88802fd9e578
FS:  00007f8ae2cd86c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000011f000 CR3: 000000002eead000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:228 [inline]
 check_wait_context kernel/locking/lockdep.c:4753 [inline]
 __lock_acquire+0x92e/0x7c40 kernel/locking/lockdep.c:5013
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 __perf_output_begin kernel/events/ring_buffer.c:163 [inline]
 perf_output_begin_forward+0xc3/0xa70 kernel/events/ring_buffer.c:272
 __perf_event_output kernel/events/core.c:7732 [inline]
 perf_event_output_forward+0x1ad/0x2f0 kernel/events/core.c:7750
 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9496
 perf_swevent_overflow+0x19b/0x230 kernel/events/core.c:9579
 perf_swevent_event+0x458/0x570 kernel/events/core.c:-1
 perf_tp_event+0x36b/0xc10 kernel/events/core.c:10064
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10032
 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 a2 7c 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0760 EFLAGS: 00000206
RAX: ec8f7f15f78cc500 RBX: 1ffff9200003c0f4 RCX: ec8f7f15f78cc500
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adf5de0
RBP: ffffc900001e0860 R08: ffffffff90b10337 R09: 1ffffffff2162066
R10: dffffc0000000000 R11: fffffbfff2162067 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ndisc_send_skb+0xdc2/0x1520 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3986
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__schedule+0x1087/0x4030 kernel/sched/core.c:-1
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 1f d6 9a f7 4c 89 33 4c 89 e7 4c 89 f6 e8 f1 c5 c7 f6 48 89 c7 e8 49 fa 20 f7 <48> 8b 84 24 c0 00 00 00 66 42 c7 44 28 08 f8 f8 48 c7 84 24 e0 00
RSP: 0018:ffffc9000be976e0 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffff8880b8f3ad10 RCX: ec8f7f15f78cc500
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffff88802fd9eff8
RBP: ffffc9000be97870 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: ffff88802fd9da00
R13: dffffc0000000000 R14: ffff888024615a00 R15: 1ffff11005fb3be6
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6875
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:cmpxchg_double_slab+0x128/0x350 mm/slub.c:552
Code: 02 00 00 0f 84 8e 00 00 00 fb e9 88 00 00 00 41 8d 46 20 a8 0f 0f 85 1e 01 00 00 4c 89 c9 4c 89 fa 4c 89 e0 f0 49 0f c7 4e 20 <b0> 01 75 65 eb 67 49 8b 46 08 a8 01 0f 85 e0 01 00 00 0f 1f 44 00
RSP: 0018:ffffc9000be979f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807bcc63c0 RCX: 00000000800c000b
RDX: 00000000000c000c RSI: ffffea0001ef3180 RDI: ffff88814165c500
RBP: 0000000000000000 R08: ffff88807bcc63c0 R09: 00000000800c000b
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000000
R13: 00000000800c000b R14: ffffea0001ef3180 R15: 00000000000c000c
 __slab_free+0xa1/0x290 mm/slub.c:3546
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294
 ____kasan_kmalloc mm/kasan/common.c:341 [inline]
 __kasan_kmalloc+0x1e/0xa0 mm/kasan/common.c:384
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 bpf_prog_alloc_no_stats+0xae/0x3a0 kernel/bpf/core.c:96
 bpf_prog_alloc+0x1c/0x1b0 kernel/bpf/core.c:130
 bpf_prog_load+0x7d4/0x1530 kernel/bpf/syscall.c:2597
 __sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5032
 __do_sys_bpf kernel/bpf/syscall.c:5136 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5134 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5134
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8ae1d9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8ae2cd8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8ae2026180 RCX: 00007f8ae1d9e0d9
RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005
RBP: 00007f8ae1e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ae2026218 R14: 00007f8ae2026180 R15: 00007ffc2ec699e8
 </TASK>